<template>
    <div>
        <div class="search">
            <input type="text" v-model="keyword" class="search-input" placeholder="输入城市名或拼音">
        </div>
        <div class="search-content" ref="search" v-show="keyword">
            
            <ul>
                <li v-for="item of list" 
                :key="item.id"
                 class="search-item border-bottom"
                 @click="handleCityClick(item.name)">
                    {{item.name}}
                </li>
                <li class="search-item border-bottom" v-show="hasNoData">没有找到匹配数据</li>
            </ul>
        </div>
    </div>
</template>

<script>
import Bscroll from "better-scroll"
import { mapMutations } from "vuex"
export default {
    name:"CitySearch",
    props:{
        cities:Object
        
    },
    data(){
        return{
            keyword:'',
            list:[],
            timer:null
        }
    },
    computed:{
        hasNoData(){
            return !this.list.length
        }
    },
     methods:{
      ...mapMutations({
                changeCity:'changeCity'
            }),
       handleCityClick(city){
           this.changeCity(city)
           this.$router.push('/')
       }
   },
    watch:{
        keyword(){
           if(this.timer){
               clearTimeout(this.timer)
           }
           if(!this.keyword){
               this.list=[];
               return 
           }
           this.timer=setTimeout(() => {
                const result=[];
                for(let i in this.cities){
                    this.cities[i].forEach((value) => {
                        if(value.spell.search(this.keyword)>-1 ||
                        value.name.search(this.keyword)>-1){
                            result.push(value);
                        }
                    });
                }
                this.list=result;
        
            }, 100);
          
        }
    },
    mounted(){
        this.scroll=new Bscroll(this.$refs.search)
    }
}
</script>

<style lang="stylus" scoped>
    @import '~styles/varibles.styl'
    .search
        height :.72rem
        background :$bgColor 
        padding:0 .1rem
        .search-input
            box-sizing :border-box
            width:100%
            height 0.62rem
            line-height :.62rem
            text-align :center
            border-radius :.06rem
            color:#666
            padding:0 .1rem
    .search-content
        z-index:1
        overflow:hidden
        position: absolute
        top: 1.58rem
        left :0
        right:0
        bottom:0
        background-color :#eee
        .search-item
            line-height :.62rem
            background-color :#fff
            color:#666
            padding-left :.2rem

</style>